Multilayer blasting method for bundle holes

Multilayer blasting method for bundle holes

  • CN 102,221,315 A
  • Filed: 04/29/2011
  • Published: 10/19/2011
  • Est. Priority Date: 04/29/2011
  • Status: Active Application
First Claim
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1. a boundling hole multi-segment blasting method is characterized in that, said method comprising the steps of:

  • A) offer 5-8 Φ

    120mm-Φ

    165mm big gun hole in the middle of stope, the annular clustering hole is formed in these big gun holes, pitch of holes 0.5-0.86m in the bundle;

    The boundling pitch of holes, promptly between the two adjacent annular clustering central point of hole apart from 6.5m-7.5m, along the diplopore of the hole arranged spacing 0.5-0.86m in stope border, spacing 6.5m-7.5m between the diplopore, and be staggeredly arranged with the boundling hole, in the bottom in each described big gun hole hole plug is installed;

    B) each big gun hole is divided into multilayer, and every layer height is 6.5m-7.5m, is respectively equipped with filler and explosive in every layer from bottom to top, is embedded with detonator in explosive, and wherein the height of filler is 3m-4m;

    C) detonate simultaneously in the big gun hole in the same layering, adopts elementary errors to detonate elementary errors 25ms-50ms blanking time at interval between the layering.

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